diff --git a/codespell_lib/data/dictionary.txt b/codespell_lib/data/dictionary.txt
index d95ba5e..cff6a78 100644
--- a/codespell_lib/data/dictionary.txt
+++ b/codespell_lib/data/dictionary.txt
@@ -25863,6 +25863,7 @@
 Sionist->Zionist
 Sionists->Zionists
 siply->simply
+sircular->circular
 sirect->direct
 sirected->directed
 sirecting->directing
@@ -27647,6 +27648,11 @@
 sychronmode->synchronmode
 sychronous->synchronous
 sychronously->synchronously
+sycle->cycle
+sycled->cycled
+sycles->cycles
+syclic->cyclic
+syclical->cyclical
 sycn->sync
 sycology->psychology
 sycronise->synchronise
@@ -27667,6 +27673,8 @@
 syle->style
 syles->styles
 sylibol->syllable
+sylinder->cylinder
+sylinders->cylinders
 syllabills->syllabus, syllabification,
 sylog->syslog
 symantics->semantics